Mine-elevator.



No. 890.124. PATENTED JUNE 9, 1908.

W. SHANNON, MINE ELEVATOR.

APPLICATION FILED MAR. 12, 1906.

3 SHEETS-SHEET 1.

585 I flue/firm M yaw g wzgs I No. 890,124. PATENTED JUNEQ, 1908.

W. GHANNON.

MINE ELEVATOR.

APPLICATION FILED MAR. 12, 1906.

3, SHEETS-SHEET Z.

cm, WASHINGTON, n. c.

32561622325 WQJAZ Q 1: NORRIS urns P TENT D JUNEQ' 1908.

W. GHANNON. A B

MINE ELEVATOR.

APPLICATION FILBD 'MAR. 12, 1906.

w fl iam Zdziwsses ww w 4? M UNITED S ATES ATENT @FIQE.

WILLIAM OHANNON, OF DES MOINES, IOWA.

MINE-ELEVATOR.

To all whom it may concern:

Be it known that 1, WILLIAM OI-IANNON, a citizen of the United. States, residing at Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Mine-Elevator, of which the following is a specification.

My object is to provide a mine elevator of simple, durable and inexpensive construction, not liable to get out of order and so arranged that it may automatically dump to either side and automatically return to an upright position when the cage is lowered. And my object is further to provide a dumping device that will automatically tilt the car platform of the cage when the cage is elevated to the dumping point and the platform be held in its tilted position without danger of injury to the dumping device if the cage should be moved above and beyond the dumping point.

A further object is to provlde an automatic safety brake and also to provide an improved automatic lock for the car platform to automatically engage and retain acar run on the platform from either side.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which Figure 1 shows a side elevation of a portion of an elevator shaft and an elevator cage therein embodying my invention, a portion of the guide upright being broken away to show the guide rib on the inner side thereof. Fig. 2 shows a vertical, central, sectional view of a device embodying my invention, the car platform being shown by dotted lines in its tilted position. Fig. 3 shows an edge view of a device embodying my invention with a mine car illustrated in position in dotted lines, and Fig. 4 shows a detail plan view of the. car retaining device on the tilting platform.

Referring to the accompanying drawings, I have used the reference numeral 10 to indicate the uprights of the elevator shaft. At the sides of the shaft are the guide uprights 11, each provided on its inner face with the guide rib 12, a part of which is omitted at a point slightly above the dumping chutes 13, for purposes hereinafter made clear. At the dumping chutes are the cross sills 14 and at Specification of Letters Patent.

Application filed March 12, 1906.

Patented .Tune9, 1908.

Serial No. 305,568.

the top of the elevator shaft are the pulleys 15 and 16 over which the elevator cable 17 is passed. The cage comprises a body por tion having a bottom 18, sides 19 and a top 20, preferably made of structural and plate metal. Formed in the sides near the central portion thereof are the segmental slots 21, for purposes hereinafter made clear.

Mounted on top of the cage are two levers 22, each fulcrumed on a pin 23 and connected at their inner ends with each other and with the cable 17 by the clevis 24 in the slots 25. The outer ends of these levers 22 are arranged to stand close to the inner faces of the guide ribs 12 when the inner ends of the levers are elevated and are designed to project outwardly far enough to engage and look againstthe ribs 12 when the inner ends of the levers are lowered. I have provided springs 26 attached to the top of the cage and to said levers normally tending to hold them downwardly so that in case the tension upon the rope 17 was relaxed, these springs 26 would instantly throw the levers 22 into engagement with the guide ribs 12 and lock the elevator in position to prevent its further descent but so long as the weight of the cage is supported by the rope, these lovers will be held in their inoperative positions.

The tilting car platform comprises a base 27 supported above the bottom 1.8 of the cage by the braces 28 which braces are pivoted. to the short shafts 29 in the brackets 30 on the bottom 18 to permit the platform to freely tilt in either direction. Above the base 27 are the upwardly projecting sides 31 which stand slightly spaced apart from the sides of the cage and which have their upper edges formed with the outwardly projecting flanges 32 and of segmental shape highest at the ends of the sides and curved downwardly at the centers thereof. Mounted on each of the sides 31 is a wheel retaining plate 33 arranged directly over the rails 34 011 the base 27.

I have provided means for automatically locking cars on the tilting platform as follows: Arranged. at the central portion of the base 27 are two angle plates 35 arranged to pivotally support the U-shaped levers 36 between them. The adjacent ends of said levers are near the center of the plates 35 and are spaced apart far enough to receive between them a downwardly projecting lug on a car. When the outer ends of the levers 36 are at their lower limit of movement, the inner ends of the levers project upwardly above the plates 35. Mounted at the side of one of the plates 35 is a rock shaft 37 having a crank 38 at each end, each crank being pivoted to the outer end of the adjacent lever Y 36, so that the levers 36 are moved in unison.

on the adjacent corner post of I have provided for rocking the shaft 37 by foot treadles at both ends of the platform. These treadles are indicated'by the numeral 39 and are pivoted in the brackets 40, their inner endsbeing pivotally and slidingly connected to the crank arms 38, so that when the outer end of the treadle 39 is depressed, the inner ends of both levers 36 are lowered at the same time and the car retained by them is released. The weights of the various parts of this device are such that the inner ends of the levers 36 are normally elevated and'when a car approaches same, the one on the side from which the car is approaching will be forced downwardly by a projection on the car until it is over the space between the ends of the levers 36, whereupon the inner end of each lever 36 will be raised and will engage the projection on the car and lock the car in position. Fixed to each side 31 of the dumping platform are two guide rollers 41, spaced a art far enough to'admit the rib 12 between t em and of such length as to project through the adjacent slot 21 in the side of the cage. By this arrangement, it is obvious that so long as the rollers 41 are in engagement with the guide rib 12, the tilting platform is positively locked by them against tilting movements, but when the cage reaches a point where the rollers 41 are at the point where the rib 12 is omitted, then the tilting platform may freely swing, its movement being limited only by the length of the slot. The tilting device at both ends of the platform is the same and comprises the lever 42 fulcrumed to the adjacent guide upright and extending outwardly beyond the elevator shaft, its outer end being projected through a uide strap 43 the elevator shaft. Mounted on its inner side is a roller 44 arranged in such position that when the lever 42 1s at its lower limit of movement in the guide strap 43 the roller will be engaged by the upper corner of the tilting platform and the curved edge 32 thereof will strike upon said roller as the platform is elevated and the weight of the armresting upon said corner of the tilting platform will be suflicient to cause the platform to tilt to the position shown by dotted lines in Fi 2. In this connection, one of the valuab e features of my inventionis that if in case the elevator cage should not stop in its upward movement instantly after the tilting platform was tilted, but should continue to rise, then the only effect would be to raise the weighted lever 42 and no injury would be done to the machincry and the cage could be lowered to position adjacent to the chute 13, whereas if there were a fixed roller 44 for this purpose, there would be danger of breaking some of the parts in the event that the ca e was not stopped at the proper point. I have provided for each lever 42, a hook 45 by which the lever may be supported in an elevated position where it will not be engaged by the edge of the tilting platform. Fixed to one side of the cage are two hooks 46 so positioned that they will engage the trip levers 22 immediately after the trip levers or either one of them have engaged the side of'the tilting platform as required to dump it so that when the cage rises still further, the trip lever 42 is retained in its elevated position.

I/Vhen the cage reaches the dumping chute, the guide rollers of the tilting platform are freed from the guide rib and the roller 44 of the weighted lever strikes the adjacent corner of the tilted platform and dumps it in the desired position and if it is desired to dump the tilting platform in the opposite direction, the operator simply releases the other lever 42 from its hook 45 and supports the first one in its elevated position on the hook.

Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States, therefor is 1. In a device of the class described, the combination of an elevator cage, a platform tiltingly mounted in the cage, an elevator guide terminating at the dumping point, two rollers fixed to the tilting platform and extended outwardly beyond the side of the cage, and in engagement with the opposite sides of said guide, and weighted levers pivoted in the path of the dumping platform and arranged to be engaged by the dumping platform when the rollers reach the end of the guide to thereby tilt the platform, and to yield sufficiently when engaged by the tilting platform to prevent breakage and undue strain upon the parts, .and means for holding said weighted levers in elevated positions.

2. In a device of the class described, the combination of an elevator cage, a tilting platform onthe cage, the sides of the cage being formed with segmental slots centered at the tilting point of the platform, two rollers fixed to each side of the tilting platform and projected through said segmental slots,

an elevator guide terminating at the dumping point, and having said rollers in engagement with its opposite sides, the tilting platform being provided with upright sides eX- tended to points above said slots, one of said sides being curved from its ends downwardly and toward its center, two weighted levers arranged in the path of the tilting latform, each provided with a roller designec to be en gaged by one of the ends of the curved side of the tilting platform, and means for independently supporting said weighted levers in elevated positions.

3. An elevator cage formed with segmental slots in its sides, a tilting platform mounted in the cage, a vertical guide adjacent to the cage and two rollers supported by the tilting platform passed through the segmental slot and supported by the edges of the slot and in engagement with the opposite sides of the guide.

4. An elevator cage, a tilting platform therein, a guide for holding the platform in position in the cage, said guide terminating at the dumping point, said platform having one edge projecting beyond the cage, a weighted lever in. the path of the platform and capable of swinging upwardly and a hook carried by the cage to engage and elevate the lever after the lever has been engaged by the tilting platform.

Des Moines, Iowa, February 13, 1906.

WILLIAM CHANNON.

Witnesses:

S. F. CHRISTY, J. RALPH ORWIG. 

